Sign post



FIG. 1 is a front elevational view of a sign post illustrating my new design:

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a side elevational view, looking from the right side of FIG. 1, it being understood that the opposite side is a mirror image thereof; and,

FIG. 4 is a top plan view of the sign post illustrated in FIG. 1, it being understood that the bottom plan view is a mirror image thereof. 

The ornamental design for a sign post, as shown and described. 